A sewage pump

Abstract

This utility model provides a sewage pump, belonging to the field of water pump technology. It solves the problem of inability to promptly handle leakage in existing sealed cavities. This sewage pump includes a pump body with a sealed cavity and a control box. A through hole is provided on the side wall of the pump body at the sealed cavity, connecting the sealed cavity to the outside. A check unit connected to and sealing the through hole is provided in the pump body at the through hole. The check unit includes a check pipe, two check rings, a shaft, a collar, and a spring. The check pipe is located at and connected to the through hole. The two check rings are located inside the check pipe and connected to it. Each of the two check rings has a mounting hole for the shaft to pass through. The collar is located on the shaft and connected to it, situated between the two check rings. The spring is sleeved on the shaft, with its two ends abutting against the collar and the corresponding check ring, respectively. This utility model has the advantage of enabling timely handling of leakage.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology and relates to a sewage pump. Background Technology

[0002] Sewage pumps are a type of non-clogging pump, available in various models, primarily used for transporting urban sewage, feces, or liquids containing fibers. Because the transported medium contains easily entangled or bundled fibers, leaks may occur in the pump's internal sealing cavity due to external factors during long-term use. This allows sewage to enter the sealing cavity, and over time, pressure changes within the cavity can cause sewage to come into contact with the connection between the motor shaft and the sealing cavity, leading to motor damage. To address this, some sewage pumps on the market have observation holes on the side wall of the sealing cavity and are sealed with covers. This necessitates regular inspection and maintenance, increasing maintenance costs and making it difficult to detect leaks promptly, thus failing to meet usage requirements. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a sewage pump that can promptly detect leaks in the sealed cavity.

[0004] The objective of this utility model can be achieved through the following technical solution: A sewage pump, comprising a pump body with a sealing cavity and a control box, characterized in that the pump body has a through hole on the side wall of the sealing cavity to connect the sealing cavity with the outside, and the pump body has a check unit connected to and used to seal the through hole at the through hole, the check unit comprising a check pipe, two check rings, a shaft, a collar and a spring, the check pipe being disposed at and connected to the through hole, the two check rings being disposed inside and connected to the check pipe, each of the two check rings having an installation hole for the shaft to pass through, the collar being disposed on and connected to the shaft, the collar being located between the two check rings, the spring being sleeved on the shaft, and the two ends of the spring respectively abutting against the collar and the corresponding check ring.

[0005] In the aforementioned sewage pump, the check ring is provided with several drainage holes spaced apart along its circumference.

[0006] In the aforementioned sewage pump, the outer peripheral wall of the check pipe at its outer end is provided with a hollow, outwardly protruding convex ring, and a liquid detector with a probe is provided at the convex ring of the check pipe.

[0007] Compared with existing technologies, this sewage pump is equipped with a check valve unit, which allows for the discharge of permeated liquid when the pressure inside the sealed cavity is too high. At the same time, a liquid detector is installed to provide timely alarm. Attached Figure Description

[0008] Figure 1 This is a cross-sectional structural diagram of the sewage pump.

[0009] Figure 2 This is the sewage pump Figure 1 Enlarged view of the circled area.

[0010] In the diagram, 1 is the sealing cavity; 2 is the pump body; 3 is the check pipe; 4 is the check ring; 5 is the shaft; 6 is the collar; 7 is the spring; and 8 is the liquid detector. Detailed Implementation

[0011] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0012] like Figure 1 , Figure 2 As shown, this sewage pump includes a pump body 2 with a sealed cavity 1 and a control box. The pump body 2 has a through hole on the side wall of the sealed cavity 1, connecting the sealed cavity 1 to the outside. A check unit connected to and used to seal the through hole is installed on the pump body 2 at the through hole. The opening and closing of the check unit is controlled by the pressure difference within the sealed cavity 1, thereby achieving the effect of discharging liquid entering the sealed cavity 1. The check unit includes a check pipe 3, two check rings 4, a shaft 5, a shaft collar 6, and a spring. A spring 7 and a check tube 3 are disposed at the through hole and connected thereto. Two check rings 4 are disposed inside the check tube 3 and connected thereto, and a check cavity is formed between the two check rings 4 through their cooperation with the check tube 3. Each of the two check rings 4 has a mounting hole for the shaft 5 to pass through and is coaxial with the check ring 4. A collar 6 is disposed on the shaft 5 and connected to it, and is coaxial with it. The collar 6 is located between the two check rings 4. A spring 7 is sleeved on the shaft 5. The spring 7 has two ends that abut against the collar 6 and the corresponding check ring 4, respectively. The check ring 4 that abuts against the spring 7 is located at the outlet of the check pipe 3. Each check ring 4 has several drainage holes spaced apart along its circumference. When there is no leakage, the collar 6 abuts against the check ring 4 at the inlet of the check pipe 3 through the spring 7, and seals the drainage holes through the collar 6. The outer peripheral wall of the check pipe 3 at the outer end is provided with an axially outwardly protruding and hollow convex part. The check pipe 3 is connected to the outside of the convex ring 4 by the convex ring. The convex ring is located outside the check pipe 3. A liquid detector 8 with a detection rod is installed on the check pipe 3 at the convex ring. The detection rod extends into the check pipe 3 through the convex ring. When the liquid detector 8 detects liquid for a long time, it will send a signal to the control box and issue an alarm through the control box. The outer end face of the check pipe 3 is set with a conical structure. A filter screen can be installed at the open end of the check pipe 3.

[0013] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0014] Although this document uses terms such as "etc." extensively, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A sewage pump, comprising a pump body (2) with a sealed cavity (1) and a control box, characterized in that, The pump body (2) has a through hole on the side wall of the sealing cavity (1) to connect the sealing cavity (1) with the outside. The pump body (2) has a check unit connected to the through hole and used to seal the through hole. The check unit includes a check pipe (3), two check rings (4), a shaft (5), a collar (6) and a spring (7). The check pipe (3) is located at the through hole and connected to it. The two check rings (4) are located inside the check pipe (3) and connected to it. The two check rings (4) are each provided with an installation hole for the shaft (5) to pass through. The collar (6) is located on the shaft (5) and connected to it. The collar (6) is located between the two check rings (4). The spring (7) is sleeved on the shaft (5), and the two ends of the spring (7) abut against the collar (6) and the corresponding check ring (4) respectively.

2. A sewage pump according to claim 1, characterized in that, The check ring (4) is provided with several drainage holes spaced apart along its circumference.

3. A sewage pump according to claim 1, characterized in that, The check pipe (3) has an axially outward protruding and hollow convex ring on its outer peripheral wall at the outer end. The check pipe (3) has a liquid detector (8) connected to the convex ring and equipped with a probe rod.

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